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High Blood Pressure (Hypertension) in cats

Author: Dr. med. vet. Gisa Löwe | Last modified: 17.02.2026

When to visit the vet?

Urgent see a veterinarian within 24 hours

Red flag if sudden blindness, convulsions, severe disorientation, acute respiratory distress, or severe bleeding in eye/retina

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Definition

High blood pressure in cats, also known as hypertensionHypertension, or high blood pressure, is a condition in which the blood pressure in the arteries is consistently elevated. In dogs and cats, this can lead to damage to organs such as the heart, kidneys, and eyes, and requires medical treatment., is a condition in which the blood pressure in the arteries is chronically elevated. This can lead to various health complications, especially if left untreated.

Can Occur with the Following Diseases:

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Basics and possible causes

High blood pressure in cats is often secondary, meaning it occurs as a result of another underlying condition. The most common causes are chronicChronic refers to a condition or disease that is long-lasting or permanent. Chronic diseases often develop slowly and can lead to persistent or recurring health problems over time. kidney disease and hyperthyroidism (overactive thyroid gland). Both conditions are widespread in older cats and can lead to an increase in blood pressure.

ChronicChronic refers to a condition or disease that is long-lasting or permanent. Chronic diseases often develop slowly and can lead to persistent or recurring health problems over time. kidney disease impairs the kidneys’ ability to remove waste products and excess water from the blood, which can lead to an increase in blood volumeBlood volume is the total amount of blood circulating in an organism's circulatory system. Changes in blood volume can indicate various health conditions, including dehydration or cardiovascular disease. and thus blood pressure. In hyperthyroidism, the overproduction of thyroid hormones accelerates metabolism, which strains the cardiovascular system and raises blood pressure.

There is also primaryPrimary refers to the first or original cause of a disease or condition, as opposed to secondary causes or symptoms that develop from it. hypertensionHypertension, or high blood pressure, is a condition in which the blood pressure in the arteries is consistently elevated. In dogs and cats, this can lead to damage to organs such as the heart, kidneys, and eyes, and requires medical treatment., which is less common and in which no underlying condition can be identified. Genetic factors can play a role, as can environmental factors such as diet and stressStress refers to the state of an organism reacting to external stimuli or demands. In veterinary medicine, stress can have physical or psychological effects on animals, impacting their health and well-being..

Typical accompanying symptoms

Visual disturbances: High blood pressure can damage the blood vessels in the eyes, which can lead to vision loss or sudden blindness. This is often one of the first signs that pet owners notice.
Behavioral changes: Cats with high blood pressure may appear disoriented, withdraw, or show signs of restlessness. These behavioral changes are often due to circulatory disorders in the brain.
Nosebleeds: In some cases, high blood pressure can lead to nosebleeds. However, this is less common and usually occurs in conjunction with other serious symptoms.
Heart murmurs: A veterinary examination may reveal heart murmurs, which indicate a strain on the cardiovascular system.
Seizures or Limb weakness: In severe cases, high blood pressure can cause neurological symptoms such as Seizures or Limb weakness.

When to see a vet?

A veterinary visit is urgently required if your cat suddenly appears to be blind or shows signs of disorientation. These symptoms often indicate a serious complication of high blood pressure that requires immediate attention.

Also, if your cat is vomiting regularly, losing weight, or drinking and urinating excessively, you should consult a veterinarian. These symptoms may indicate an underlying condition causing high blood pressure.

If you notice heart murmurs in your cat or a combination of the symptoms mentioned, a visit to the veterinarian for further examination is necessary.

Symptom recognition for the pet owner and veterinary diagnostic procedure

Detecting high blood pressure in cats can be challenging for pet owners, as symptoms are often subtle or appear late. Regular veterinary visits are crucial, especially for older cats, to routinely monitor blood pressure.

The veterinarian will measure your cat’s blood pressure using a special device that is attached to the tail or a leg, similar to humans. MultipleMultiple means manifold or repeated and is used to describe conditions or events that occur in multiple instances or at different locations. In veterinary medicine, this may indicate multiple lesions, tumors, or other pathological changes. measurements are necessary to obtain accurate results and rule out stressStress refers to the state of an organism reacting to external stimuli or demands. In veterinary medicine, stress can have physical or psychological effects on animals, impacting their health and well-being. as a contributing factor.

In addition to blood pressure measurement, the veterinarian may perform blood and urine tests to look for signs of kidney disease or thyroid problems. An eye examination can also help detect damage to the blood vessels in the eye.

What the pet owner can do and professional therapy options

As a first step, the pet owner should ensure that the cat lives in a stress-free environment, as stressStress refers to the state of an organism reacting to external stimuli or demands. In veterinary medicine, stress can have physical or psychological effects on animals, impacting their health and well-being. can raise blood pressure. Make sure your cat has plenty of quiet retreats and avoid sudden changes in the environment.

Feed your cat a balanced diet recommended by the veterinarian. If an underlying condition has been diagnosed, follow the specific dietary recommendations for that condition to control blood pressure and promote overall health.

If the veterinarian prescribes medication to lower blood pressure, make sure it is administered exactly as directed. Regular follow-up examinations are important to monitor the effectiveness of treatment and make adjustments if necessary.

Outlook on current research

Research on hypertensionHypertension, or high blood pressure, is a condition in which the blood pressure in the arteries is consistently elevated. In dogs and cats, this can lead to damage to organs such as the heart, kidneys, and eyes, and requires medical treatment. in cats has increased in recent years as awareness of the importance of this symptom in veterinary medicine grows. Current studies focus on the prevalence of high blood pressure in older cats, particularly those with chronicChronic refers to a condition or disease that is long-lasting or permanent. Chronic diseases often develop slowly and can lead to persistent or recurring health problems over time. conditions such as kidney failureRenal failure is a condition in which the kidneys can no longer adequately perform their function of filtering and excreting waste products from the blood. It can be acute or chronic and requires immediate medical treatment. or hyperthyroidism. Scientists are investigating how common hypertensionHypertension, or high blood pressure, is a condition in which the blood pressure in the arteries is consistently elevated. In dogs and cats, this can lead to damage to organs such as the heart, kidneys, and eyes, and requires medical treatment. is in cats diagnosed with these diseases to emphasize the need for regular blood pressure measurements.

Another focus of research is the development and refinement of non-invasive methods for measuring blood pressure in cats. Traditionally, it has been challenging to accurately measure blood pressure in cats, as they are often stressed during examination. Researchers are working on technologies that cause less stressStress refers to the state of an organism reacting to external stimuli or demands. In veterinary medicine, stress can have physical or psychological effects on animals, impacting their health and well-being. while providing precise measurements, such as oscillometric devices and Doppler ultrasoundUltrasound refers to sound waves that are above the hearing threshold of the human ear. In medicine, ultrasound is used for diagnostic imaging procedures to visualize internal organs, tissues, and blood flow..

Genetic studies are also underway to identify potential genetic markers that could predispose cats to developing hypertensionHypertension, or high blood pressure, is a condition in which the blood pressure in the arteries is consistently elevated. In dogs and cats, this can lead to damage to organs such as the heart, kidneys, and eyes, and requires medical treatment.. This research could help identify at-risk cats earlier and take preventive measures in the long term. Additionally, it is being investigated whether certain breeds have a higher risk of hypertensionHypertension, or high blood pressure, is a condition in which the blood pressure in the arteries is consistently elevated. In dogs and cats, this can lead to damage to organs such as the heart, kidneys, and eyes, and requires medical treatment., which could lead to specific screening recommendations.

The effectiveness of various medications for treating hypertensionHypertension, or high blood pressure, is a condition in which the blood pressure in the arteries is consistently elevated. In dogs and cats, this can lead to damage to organs such as the heart, kidneys, and eyes, and requires medical treatment. in cats is also being studied. This includes both conventional medications used in humans and new therapies developed specifically for cats. Researchers are trying to determine which medications are most effective in controlling blood pressure while minimizing the risk of side effects.

Another area of research is examining the long-term effects of untreated hypertensionHypertension, or high blood pressure, is a condition in which the blood pressure in the arteries is consistently elevated. In dogs and cats, this can lead to damage to organs such as the heart, kidneys, and eyes, and requires medical treatment. in cats. It is being investigated how chronicChronic refers to a condition or disease that is long-lasting or permanent. Chronic diseases often develop slowly and can lead to persistent or recurring health problems over time. high blood pressure affects the life expectancy and quality of life of cats, and what organ damage may occur. These studies emphasize the need for early diagnosisA diagnosis is the identification of a disease or condition by its symptoms and/or results from diagnostic tests. It is the first step in the management and treatment of patients. and treatment to avoid complications.

Interdisciplinary approaches combining cardiologyCardiology is the branch of medicine that deals with diseases and disorders of the heart and circulatory system. Cardiologists diagnose and treat heart conditions such as coronary artery disease, heart failure, and arrhythmias., nephrology, and endocrinologyendocrinology is the medical specialty that deals with hormones, the endocrine glands that produce them, and their diseases. It includes the diagnosis and treatment of disorders such as diabetes, thyroid diseases, and hormonal imbalances. are gaining importance. Such approaches enable a deeper understanding of the complex interactions between hypertensionHypertension, or high blood pressure, is a condition in which the blood pressure in the arteries is consistently elevated. In dogs and cats, this can lead to damage to organs such as the heart, kidneys, and eyes, and requires medical treatment. and other health problems in cats. Integrating these findings into clinical practice could significantly improve the diagnosisA diagnosis is the identification of a disease or condition by its symptoms and/or results from diagnostic tests. It is the first step in the management and treatment of patients. and treatment of high blood pressure in cats.

Research initiatives are also focusing on the role of diet in regulating blood pressure. Studies are examining how certain diets or dietary supplements could help control blood pressure in cats. This could represent a supportiveSupportive refers to supportive treatments that aim to alleviate symptoms and improve quality of life without directly treating the underlying cause of the disease. therapyTherapy refers to the treatment of diseases or disorders with the aim of alleviating symptoms, promoting healing, or improving quality of life. Therapies can be medicinal, surgical, or through other medical interventions. option for cats with hypertensionHypertension, or high blood pressure, is a condition in which the blood pressure in the arteries is consistently elevated. In dogs and cats, this can lead to damage to organs such as the heart, kidneys, and eyes, and requires medical treatment. and reduce dependence on medications.

Finally, scientists are researching the effects of environmental factors and lifestyle changes on cats’ blood pressure. This includes examining how stressStress refers to the state of an organism reacting to external stimuli or demands. In veterinary medicine, stress can have physical or psychological effects on animals, impacting their health and well-being. reduction, regular exercise, and a stable, stress-free environment can contribute to blood pressure control. Such approaches could be particularly suitable for cats that are sensitive to changes in their environment.

Frequently asked questions

1. What does hypertension mean in cats?

Hypertension in cats means that blood pressure is above the normal range. This can cause a variety of health problems if left untreated.

2. How is blood pressure measured in cats?

Blood pressure in cats is often measured with oscillometric devices or Doppler ultrasound. These methods are non-invasive and relatively low-stress for the cat.

3. What symptoms in cats can indicate hypertension?

Symptoms can include visual disturbances, behavioral changes, nosebleeds, convulsions, or sudden blindness. Often, however, there are no obvious signs.

4. Why is hypertension dangerous in cats?

Untreated hypertension can lead to serious health problems, such as heart and kidney damage, strokes, and eye problems.

5. Can all cats develop hypertension?

Theoretically yes, but older cats and those with certain pre-existing conditions such as kidney disease or hyperthyroidism are particularly at risk.

6. How is hypertension treated in cats?

Treatment often includes medication to lower blood pressure as well as treatment of any underlying conditions.

7. Can diet affect a cat's blood pressure?

Yes, special diets can help regulate blood pressure, especially those that reduce sodium and are rich in omega-3 fatty acids.

8. How often should blood pressure be checked in cats?

For older cats or those with pre-existing conditions, regular monitoring is recommended, often at least once a year or as directed by the veterinarian.

9. Are certain cat breeds more susceptible to hypertension?

There is evidence that some breeds may be more susceptible, but further research is needed to confirm this.

10. Can stress in cats raise blood pressure?

Yes, stress can temporarily raise blood pressure, which is why it is important to create a stress-free environment, especially before blood pressure measurements.